Enforce read-only access on EFS to pod

Question

Hello,
I have two k8s pods accessing the same EFS. One pod writes in the filesystem and the other reads from it. How can I limit the access of the 2nd pod to readonly?

Answer

Hi

Two ways you can do it

1. PVC with ReadOnly Access Mode: Create a separate PVC with accessModes: ["ReadOnly"] for the read-only pod.

https://aws.amazon.com/blogs/storage/persistent-storage-for-kubernetes/
Or 
2. Pod Security Policies (PSPs):Enforce Read-Only Mounts: Create a PSP that restricts pods to read-only volume mounts.
Annotate Read-Only Pods: Annotate pods requiring read-only access with a designated key-value pair.

https://kubernetes.io/docs/tasks/configure-pod-container/security-context/

Enforce read-only access on EFS to pod

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